Impulse-transmitter.



C. R. A'ST IMPULSE TRANSMITTER.

APPLIGATIOH NLRB IBB. 15, 1911.

Patented Aug. 20, 1919.

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G2 TJSTHL UJPULSE TRANSMITTER.

APPLICATION FILED FEP. 15, 1911.

Patented Aug. 20, 1912 C. R. AUSTIN.

IMPULSE TRANSMTTER.

APPLICATION FILED 125.15, 1911.

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CHARLES R. AUSTIN, OF LGS ANGELES, CALIFORNIA, ASSIGNOB, TO SOUTHERNCALI- FORNIA MANUFACTURING COMPANY, F LOS ANGELES, CALIFORNIA, ACORPORA- TION OF CALIFORNIA.

IMPULSE-TRANSMITTEB.

Specification of Letters Patent.

Patented Aug'. 20. 1 912.

Application led February 15, 1911. Serial No. 608,818.

l Angeles, in the county of Los Angeles and State of California, haveinvented a new and useful Impulse-Transmitter, of which the following isa specification.

This invention relates to a dial operated impulse transmitter fortelephone systems, and the main object is to furnish a more perfectvelectric impulse and to produce the impulses consecutively'otl uniformcharacter. '.lhe ordinary impulse transmitter is operated mechanicallyand involves a spring and governor which are liable to vary somewhatinoperation, both as to time and character; while, in the presentinvention the mechanism of the impulse transmitter i-s operatedelectrically and exactly measures each impulse, so that. all impulsesare substantially uniform and in more perfect time.- This enables theswitch to be operated much faster and withgreater accuracy. Anyinequalities in the impulse affects both the impulse transmitter and theswitch, whereby the members sent out by the impulse transmitter willnecessarily correspond with that setby the switch. Another advantage isthat there `is no return movement ot' the manually operated indicatingarm which, when onceplaced on a certain number, will stay on that numberand repeat the same unless reset at another number.

Another object is to produce automatic ringing, whereby thev operatorsets thc indicating arm at the number to be called, the dial mechanismthen automatically transmits the required impulses to properly set theswitch andwhen the switch is set, the dial mechanism automaticallysendsl the ringing current over the line for a definite period, at theconclusion ot which the ringing stops, this operation taking placewithout attention of the operator, except. the setting of the indicatingarm at the number to he called.

Referring to the drawings: Figure l is a front elevation. Fig. 2 is aplan view. Fig. 3 is a rear elevation. Fig. 4 is a section on lineact-c4 in Fig. 3. l `ig1 5 is a diagrammatic view showing the manner ofconnecting the instrument in a system. Fig. (3

diagrammatic view showing the dial member separated from the switchmember. Fig. 7 is a sectional view on line aci-x7 Fig. 6.

1 designates an angle iron to which is attached a bracket 2 by means ofscrews 3, and screwed in the bracket 2 is a stud 1. A shaft 5 has oneend journaled in the stud 4 and its other end journaledin the uprightarm G of the bracket 2. series of contacts 7 are clamped between tworings 8, being` linsulated therefrom by rings of insulation 9, the rings8 being secured to the angle iron 1 by screws 10 and to arm 6 by screws11, which screws pass through a supporting plate 12, the inner ring 8being separated from the plate 12 by sleeves 18. Secured to thesupporting` plate 12 is a dial 111 being attached by screws 15. i

Rigidly attached to the shaft 5 is a ratchet lwheel 16 and attached tothe shaft 5 is abrush 17 which, as shaft 5 revolves, wipes the contacts7. The brush 17 has a disklike hub 18 and a wiping spring 19, whichpasses through and is held by ring 8, and makes electrical Contact wit-hthe disk 18 of the brush 17 when the latter is in any position. The dial14: has a series of holes 20 arranged .in a circle and numbered from oneto titty, or as many, more or less, as may be required, according to thecapacity the instrument is to have, the designating number of the holebeing shown .inclosed in a circle 21 and arranged opposite every fifthhole. .lournalcd in the supporting plate 12 is a shaft 22 to which isattached an arm 23 and riveted to the arm 23 is a spring 24 on which ahandle 'lhe inner end ot' the handle has a plug 2G adapted to fitloosely in any ot' the holes 20 and being held firmly in any hole inwhich it is placed by the tension of spring 24, thus preventing the arm23 and shaft 22 from turning accidentally. ly pulling the handle 25 outuntil the plug 26 is t'ree from the hole in the dial, the handle and itscarrying arm 23 can be revolved in an arc over the face of the dial,allowing the plug 26 to be placed in any of the holes 20. -Fixed to theshaft 22 at the back ot the dial 14 are three brushes 27, and 20.'.lhese brushes at the pointwhere they are attached to the shaft arelarger than the shaft.,- thus forming a dislililte hub or rim whichprojects as a iange from the shaft.. lhree wiping springs 2Q,

31 and 32 are' attached to the supporting plate 12 by a screw 33 andinsulated therefrom@ and from each other byfinsulation 34. The threewiping'springs 30, 31 and 32, respectively, make contact with thethrcedisklike hubs of the wipers 27, 28 and 29, irrespective ot theangular position of the latter.

An electric magnet 35 supported on the t angle iron 1 has an armature 36pivoted at pivoted at 47 and having an arm 48 which normally restsagainst the pawl 43. A spring 49 causes the armature 46 to hold bothpawls 43 and 41 out of engagement with the ratchet wheel 16, exceptwhenthe magnet45 is energized and armature 46 is attracted. The arm 48 hasan extension 50 which controls two electrical contact springs 51 and 52.A stop pin in the ratchet 16 normally rests against a pin 54 in the vsobracket` 2, -being held there by the tension of a spring 55whichfencircles shaft 5 and forces the ratchet wheel 16 inwardly, alsocausing brush 17 to rest on contact a,

' revolved until the plug or jack 26 can be In operation, to call anumber by means of the dial, the handle 25 is pulled out until spring 24rests against the arm 23 and then placed in the hole 2O in the face ofthe dial corresponding to the number to be called. As the arm 23 is thusrevolved, the hub contacts 27, 28 'and 29 turn therewith and contact 27comes to rest on a contact 7 correspending to the number of the jack inwhich the plug 26 is placed. The hub contact28 y rests on a Contact 7(preferably the second) tollowing that on which contact 27 rests, whilethe contact 29 rests on a contact 7 following that on which the contact28 rests, but removed therefrom by a number of kintervening contacts. 7,depending on the length ot' ring to be given, which is determined byproperly adjusting the angular relation of the contact-.29 to thecontacts 27 and 28. A key 56 is then pressed which locks itself down andconnectsthe dial by a relay 57 to a trunk and energizing release ymagnet45, the circuit being made from battery b, through wire 45d to wire 45/to wire '45b to wire 45a, through the winding of release magnet 45,through wire 60 to wire 59 to relay 57, and through the windings-there-Vof to wire 58 to key 56 to ground and from ground to battery Za. Batterycurrent now l fiows through wie 45 to resistance R, through Wire 83 andWire 83 to contact 57 u of relay 57 (the armature of relay 57 being up),thence through wire -57b to sleeve side ot' trunk. Relay 57 and releasemagnet 45 are now energized and their armatures are up. Release magnet45 on becoming energized` allows pawls 43 and 41 to engagethe ratchet 16and close contacts 51, 52. Cir.

cuit is then made from battery b through wire 45d to armature45f whichis down, through wires 61, 62 to contact 63 vof vibrating relay C, andthrough the contacts 63, 64 of the latter, through winding of magnet C,thence through Wires 66 and 76 to contacts 52 and 51 of magnet 45 towire 67 to ground. This starts relay C vibrating and sends pulses ofcurrent from middle contact 63 of relay C to top Contact 65 of same,through wire 68 to magnet 35, to wire 69 to ground, and also throughleft hand contact ot' relay D and wires 70 and 71 to contact-72 of relay57, to wire 73 land tip of trunk line. Each pulsation'from relay-Cpassing through' Wire 68 thus energizes mag net 35 and causes pawl 41acting on ratchet 16 to move brush 17 `one contact, also passes out on.the trunk line to set up' the trunk switch TS one contact, so that forevery contact that brush 17 is set up, the brushes of ther trunk switchare set up correspond ingly. The construction of the trunk switch TS andthe circuits which connect it with the dial operated impulse transmitterform no part of the presentinvention, but comprise the subject matter ofa companion application of mine filed March 16th, 1911, serial No.614,948.-

In Fig. 1, the arm 23 of the dial is set in the ninth hole (the firstbeing 0), and the movable contact 27 rests on the corresponding contact7. When the vibrating relay C has given eight impulses, contact 17 willrest on the same contact as the movable con` tact 27 and the brushes ofthe line switch will rest on the ninth set of contacts, a'circuit nowbeing established as follows, from battery b, wires 45d, 45, ,45", 45eto brush 17 to contact 27, through wire 74 to winding of relay D,through wire 75 and Awire 76, to

contacts 51, 52, and wire 67' to ground, thus energizing -relay D. -Therelay D on becoming energized attracts its contact 77 and breaks theconnection betweenvwires 68 and 70, thereby opening the connection fromvibrating relay C to the trunk line and stopping the brushes of thetrunk switch and connects wire 70 with wire 78 and through the medium ofcontacts 79 of relay E with wire 80, to winding of relay B, thencethrough wire 75, wire 76, contacts 51 and 52 to ground, which connectsdirectrbattery through contacts of relay B, wire 61, contact 81 of relayD, and wire 82, to wire '83 ot trunk line, thereby shunting outresistance R and locks itself up by connecting its Winding to batterythrough its own contact, by reason of its coils being energized 'andback 'to generator (l.

insecte through Wire 45g, which holds its contact 45h closed. Armature77 now being attracted breaks connection of Wire from Wire 68,

preventing further impulses from being sent over the line from relay (l.

If subscribers line is busy7 the circuit Will be closed through hisinstrument and the battery current on the sleeve side of the trunkpassing` through subscribers line and instrument comes back on tip oftrunk, through Wire 73, Contact 72, Wires 7l and 70, to Contact 77 ofrelay D, through Wire 78` contact 79, wire 80, thence to Winding otrelay B, thence through Wires 7 76, to contacts 51 and h2, thence toground, thus venergizing relay B which attracts its armature a' andlights lamp 84 through thefolloiving circuit: Battery current from Wire45"vv passes to wire 84, thence to lamp ,84, contact 75a, Wire 75, wire76 to contacts 51, 52, Wire 67 to ground. lighted indicates to operatorthat 'the line is busy; relay B also opens battery to vibrat- -ing relayC rendering it inoperative and preventing ringing on a busy lino. Asubscribers line .not being in use, brush 17 continues movement until itmakes a contact with contact 28, when battery current from brush 17flows to contact 2S through wire 28a to relay E and through'wire 28h tocontact 75a of relay B, thence through wires 75, 76 and contacts 5l and52 to ground. Relay E becoming energized locks itself up bv closing itsown contacts to battery from its Winding 'through Wire 175g and alsoopens connection trom wire SO to relay E and connects ringing current towires 78 and 70 and trunk line. 'The circuit for ringing which is thusmade is from generator G, wire g to contact 75), wire 78, 'Contact 77,n'ire 70, Wire 7l to contact 73 and wire 73 ot the trunk line, thence byany suitable circuits through the subscribers instrument Brush i7continlt in motion traveling- 5 across the several 'intcrveiringcontacts7 until it roaches contact 2l-l, when battery current from brush 17passing., to contact i?l, through Wire 25) to coils ofthc restoringmagnet lP to ground.

lencrgizes coils l?, which releases liey 56.

Releasing lrev 5o opens contact through release magnet. l5 and relay 57.ARelease magnet 45 on becoming doinergizcd diseugages pawls il and stilfrom ratchet lo and brush l?, drops bar-l( to normal position, also contarts ot' release magnet #l5 being open, break ground circuit for relaysll, li and .il and restores everything to normal position. Relay 57dropping back disconnects the impulse transmitter from trunk.

A brief summary ot the operation is as follows: Upon pushing the button5G, relay 57 and release magnet ft are energized and the latter startsthe vibrating switch C Wnich operates during the travel o' brush Thelamp S4 beingi 17 from the starting point. lllfhen brush i7 reaches thecontact 27, relay l) is energized and it" line is busy, relay B will beener gized, also. lighting lamp 8l. Upon brush t7 reaching contact 28,relay E is energized which starts the ringing current over the linewhichv continues until brush 17 reaches contact :29, whereupon the heyis aut-ornati -cally released by coils F and all parts are Athedialmember separated from the :switch member. The construction of thetwo parts as'separated is unchanged, While thecoir tacts 7 areVconnected with the associatedl contacts 7, by 'Wires w. Unly few of thewires 'w shonn; the rest being omitted tor clearness ot illustration.

liVhat ,it claim is:

l. A dial, an indicator movabler into :various positions thereon, aswitch member with stationary contacts in definite relation to the dial,a movable contact having delinite relation to said indicator andmovablev into contact with any of said stationary contacts, a travelingbrush adapted to travel along and contact with any oit said stationarycontacts, a magnet With means for ad vancingr said brush 'one contacteach time said magnet is energized, and means for intermittentlyenergizing said magnet 'to move said lnush Yto the Contact on which saidmovable Contact rests.

2. A dial, an indicator movable into various positions thereon, a switchmember with stationary contacts in definite relation to the dial, threemovable contacts having definite relation to said indicator and mov-.able into contact with three correspondingly spaced stationarycontacts, a traveling brush adapted to travel along and contact withaniv ot said stationary contacts, a magnet with means tor advancing saidbrush. one contact. each time said magnet energized, means torintermittently energizing said magnet. and'means lor restoring saidbrush lo normal position upon its reaching the third movable Contact.

il. fr dial, an indicator movable into various positions thereon, aswitch member with stationary contacts in Llcl'inite relation to thedial, three movable contacts haring dclinite relation to said indicatorand movable into contact with three correspondingiyY spaced stationarycontacts, a traveling brus i adapted to travel along and contact withany of said stationary contacts, a magnet with means for advancing saidbrush one contact each time said magnet is energized, means forintermittently energizing said magnet, means for restoring said brush to`pawl, a vrelease magnetfor releasing said pawl, and ai vibrating relayconnected with the operating magnet.

5. A dial with a series of holes, an indicating arm movable over thedial and provided .with means for engaging any of said holes to retainthe indicating arm in vposition, a switch member provided with a seriesof stationary contacts, a shaft operated by said indicating armfaplurality of movable contacts carried by said shaft and movable finteengagement-with any of the stationary contacts, a brush adapted totravel along said stationary cont-acts, another shaft to carry saidbrush, means for 'intermittently actuating thelatter shaft in onedirection, and means for nioif'ing the latter shaft in reverse directionwhen said actuating means is released.

6. A dial, an indicating arm movable over the dial, means for detachablyholding the indicating arm in position on the dial, a series ot" movablecontacts operated by said indicating arm and movable into engagementwith any of the stationary contacts, a brush movable across thestationary contacts,

4 a shaft carrying said brush, a ratchet wheelv on said shaft, a .pawlfor operating said ratchet, an Aoperating magnet for actuating saidpawl, a release magnet fork releasing said pawl, and spring means forrestoring said ratchet, shaft and brush to normal position when saidpawl is released.

7. Al dial, an' indicating arm movable over the dial, a plurality oitmovable contacts 'operable by the indicating arm overthe s'tationarycontacts, eacbof saidmovable contacts having a/fiange at its inner end,a plurality of wipers engaging the respective flanges, a brush rotatableover the stationary contacts, ashatt carrying saidg brush, an operatingmagnet with means for actuating said brush in one direction, a releasemagnet -for releasing` saidf actuating mea-ns, and

leased.

v8. ln` combination, 4two terminals at least A one off which isrotatable to alter the disy tance between said terminals, a Vmember fmovable from one terminal to the rotatable terminal, means for movingsaid member, and means coact-ing with said member for producing adefinite number of electric impulses corresponding to the distancebetween said points during the, movement of said member toward thevariable terminal.

9. In combination, means including a v Vmember movable through an arefor producing a number of electric impulses in definite relation to itstravel, a contact rotati'iblyA adjustable to various positions in saidare, and means for stopping said impulses when said member reaches andmakes contact with said adjustable Contact.

10.'In combination, meansv including member movable through an arc forproducing a number of electric impulses in definite relation to itstravel, a contact adjustable to various positions -in said arc, meansfor's'topping said impulses when said meinber reaches and makes contactwith said ad justable contact, another contactadjustable beyond thefirst contact, and means for maintaining a ringing current during thetravel of said member from the first mentioned contact to the lattercontact.

11. ln combination, means including a member movable through an areforproducing a number of electric impulses in definite relation to itsti'avel,'a contact adjustable to lvarious positions in said arc, meansfor stopping .said impulses when said member reaches and makes Contactwith said adjust able contact, another contact adjustable be yond thefirst contact, means for maintaind ing a ringing current during thetravel of said member from the first mentioned coni tact to the lattercontact, and means operating when the member reaches'the latter contac'tfor returning said member. to normal position. l.

In testimony whereof, I have hereunto set my hand at Los Angeles,California, this 18th day. of January, 1911.

`CHARLES R. AUSTIN.

In presence ofl G. T. HAGKLEY, FRANK L. A. Girar-IAM.

